Sewing-machine.



l. M. MEREOW.

SEWING MACHINE.-

APPEICATION mm our. 19, m5.

Patanted Oct. 16, 1917.

2 SHEETS-SHEET I.

INVEN'TU Hrs A nguev's J. M. MERROW.

SEWING MACHINE.

APPLICATION nuzo OCT. 19. 1915.

Patented Q01}. 16, 1917.

2 SHEETS-SHEET 2.

magma TTD NEYS.

pads are made up of rinirrnn snares earner enrich;

JOSEPH M. MERROW, 0F HARTFORD, CONNECTICUT, ASSIG-NOR TO THE Ii'IEPvROWMACHINE COMPANY, OF HARTFORD, CONNECTICUT, A

NECTICUT.

CORPORATION OF CON- SEWING-MACHINE.

Patented Get. in, 1917.,

Application filed Catcher 19, 1915. Serial No. 56,700.

To all whom it may concerns Be it known that l, Josnrrr M. Msnnow, acitizen of the United States, residing at Hartford, in the county ofHartford, State of Connecticut, have invented certain new and usefulImprovements in Sewing-Machines; and I do hereby declare the followingto be a full, clear, and exact description of the same, reference beinghad to the accompanying drawings, forming a part of this specification,and to the figures and letters of reference thereon.

This invention relates to mechanism for facilitating the stitching ofcircular work. As an example of such work, pads employed for applyingcosmetics may be cited. These disks of soft leather, as chamois,preferably secured together at their edges by overstitching. Itis highlydesirable that the finish thus provided be neat and attractive inappearance and effected at a speed impracticable to attain withoutspecial appliances. The provision of such appliances is primarily theobject of my invention, which as will hereinafter appear possesses manyfeatures of advantage each in itself a further attained object.

In the drawings accompanying and forming a part of the presentspecification I have shown in detail and in. connection with a Morrowoverstitching machine one convenicnt form of embodiment of my invention.It is to be understood, however, that any suitable type of stitchingmechanism be substituted for that shown and described, althoughoverseaming mechanism is considered desirable and the latter is believedto be most useful for the particular work herein set forth.

Referring to the drawings Figure 1 is a front view of a Morrowovcrstitching machine embodying the present invention, certain of theparts being shown in section. and the work showing in section on line11of Fig. 2.

Fig. 2, is a plan View of the work plate and needle plate of the machineshown in Fig. 1, together with other adjacent parts.

Fig. 3, is a sectional view on line 3-3 of Fig. 2 and,

Fig. 4:, is an end view of the machine with certam parts swung to adifferent position from that in which they are shown in Fig. 1.

Similar characters of reference designate 8, for the upper looper 2,said carrier having" laterally extending arms 9 and 10, provided withroll bearing studs 11 and 12, adapted respectively to enter grooves 13and 14, in cam cylinders 15 and 16, supported by shafts 17 and 18. Gears19 and 20, connect the two cam cylinders which aresecured by set screws21 and 22, to their respective shafts, so that when the driving shaft17, is rotated the cam cylinders and shaft 18, will rotate in unisontherewith. As said cam cylinders rotate the correlated grooves thereinmove the arms 9 and 10. This motion of said arms, transmitted throughthe upper looper carrier and slide 1, causes looper 2, to reciprocatebelow the needle plate, and looper 3, to reciprocate and oscillate sothat it passes above and below the needle plate, in a curved pathextending around one edge thereof. The needle moves to cooperate withthe lower looper below the needle plate and with the upper looper abovethe needle plate, and the loopers move to cooperate with each otherbelow the plane of the needle plate, all in accordance with a well knownmethod of forming overedge stitches. The needle receives its motionthrough the link 23, which connects the needle carrier 24, with aneccentric projection 25, at the end of shaft 18.

Mechanism comprising the present invention as associated with thestitch. forming mechanism briefly set forth above will now be described.

Supported by a flangedlug 30, projecting from the machine frame 7, is awork plate carrier 31, to which is secured by screws 32, the work plateproper 323. Passing through. these two last mentioned members andserving to hold them for swinging motion upon their support, is a headedpivot pin 34, clamped against longitudinal movement work plate by screws41. The upper surface of disk 37 is flush with the like surfaces of thework plate and needle plate, so that.

when the work plate is swung to the position in which it is shown inFigs, Land 2-, the surfaces of all of said members are effective forsupporting the work. The workiplate is cut away to accommodate theturntable, and also, on that side which is toward the needle plate, itis shaped to conform to thelatter. Secured to the workplate at that sideof the turntable opposite to the needle plate, is a locating member 45,which comprises a plate having a semi-circular recess 46, which forms aguide by which to centralize the work upon theturntable. That it mayaccommodate different sizes of Work, this guide member is adjustable.Also it is provided with a curved projection '47,.by

which the work plate and associated .parts may be convenientlypositioned as required. For reasons that will become hereinafter morefully apparent, it isdesirable to maintain the'work in fixed relation tothe turntable, and clamping means for the purpose will now be described.'The work plate carrier 31, is provided with a boss 50, tapped toreceive the screw stud 51, which pivotally supports the L-shaped arm 52.Riveted or otherwise secured to thefree end of this arm 52,.is acylindrical'head 53, formed with a button 54, at one end and reduced toform a round pointed pin 55, at the "other end. A clamp disk 56, havinga shank 57, is provided with a'bore 58, to very freely receive the pin55, the rounded point of the latter being adapted to engage the bottomof the bore and press the clamp disk-against the work, said disk at thesame time being perfectly, free to turn with the work clamped between itand the turntable. Oppositely disposed halves 59 and 60, of an inwardlyflanged thimble-shaped member are secured as b screws 61, to the head53,

with the flange 2, in engagement with an annular groove 4, in'the clampd-isk shank. The relative p sition of said flange 62, length of pin 55,depth of bore 58, and width of groove 64, o viously insure confinementof effective pre ure contact upon thedisk,

to the rounded oint of the pin and bottom of the'bore. S ch contact is.desirable, inasmuch as it pe mits the clamp disk, as be convenient hold,by which said clamp may 1- be rotated by the operator, toinitially movethe work into proper position withrespect to the stitching mechanism. Asw ll have been inferred, the L-shaped arm 52, is man-- ually movableabout its pivot, to permit the clamp disk to be moved into a positionadjacent to the work plate, as shown in Figs. 1 and 2, or away from thework plate, as shown in Fig. 4. It is convenient to have this armfrictionally held at its pivotal joint, so that it will slightly resistdisplace '.ment from the various'positions to which it is adjustable. Afriction washer as 66, of leather or othersuitable material,introducedunder the head of screw stud 51,- accomplishes this end, and,for present purposes, is found more useful and convenient than a springacting upon the arm. The degree of friction exerted upon'said arm,

may be regulated by adjusting the screw stud, which latter may be heldin a desired adjustment by a set'screw, as 67, tapped into the boss 50.

When in clamping relations, the .clamp disk 56, is-axially alined withthe turntable 37, so that these two members, together with' the workfirmly secured between them, are perfectly free to be rotated by feeddevices, to advance the peripheral margin of the work to the stitchingmechanism.

In connection with the feed dog 68, which operates in the usual waythrough the needle plate, I prefer to use a rotary or wheel presser footas illustrated. Such a device "forms the subject of Un-ited StatesPatent- #1,001,388 granted to H. ,B. Gould, August 22nd, 1911, andtherefore need not here be described at length; It will suffice tostate,

that the presser foot 70, which has-a small work engaging area,co-active with the needle plate to prevent backward movement of saidwork during retraction of the feed dog, and

to facilitate the control of the edge of the work, is supplemented by-anaxially inclined peripherally serrated wheel 71, which holds thework, without stretching Or buckling effect, against the feed dogdurin%the advancing movement of the latter. oth

the presser foot and wheel, are.carried at' the end of the usual presserbar 73, and are normally forced toward the needleplate, by a spring as74. A lifter lever 75, for raising the presser. bar to permit of workbeing introduced under; the wheel and presser foot,. is.- ,.pivotedv at,76, to the head cap 77. One arm 78, of said. lifter is adaptcd toengage a pin T injecting from the 1n'esser bar through slot 80, inthehcad cap 77, while another arm 82., is suitably extended to receive acord; or chain (not shown) by which the lift may be operated, in adirection to lift ti er bar, as by :toot power. lilorement o aal leverin the opposite direction, imparted spring 8:2, secured at its ends toears and S-l, extending respm-tively ironi lever 13, and head cap 7?.Normally this sprirfgmaintains the lever in the Qtion in which it shownin 5. thus held, it permits freedom lo'r that movement of the presscrbar which elllected by the feed dog. in order to confine tin: nu zementoi lever T5, to limits within which it is desirably effective, it isprovided with 1 pin 86, which projects into a slot 87. in the head InFigs. 1 and 2, l have illustrated for trin'nning the work, nzechani acommonly employed in connection with the type or machine shown. Suchmechanism, which operated in a well know-n manner, in cludes the lowercutter 5J0 upper cutter 91, which cutters operate LC- trim the w .rkadjacent to one oi the needle plate, slightly in advance of needle.cutters are adjustable in the usual manner, so that the line oftrimming, or distance of the cutters from the line of needle penetrwtion, may be varied. Should it be desirable to vary the line o -ieedltration, with respect. to the cent work, the stop screw )3, may beadjusted, said screw being threaded into the ln'acl-Letand adopted atits point, to hear an: 1e needle plate support, to thereby sinilinwardswing of the work.

Control over the positioni r or the work plate, is facilitated byintroducing a spring backed plunger as beneath the work plate carrier.The plunger is forced against said carrier, with suiiicientpressure topre- Xent objectionable freedom of movement thereof together with thework plate, about the pivot 34. l urt-hermore the plunger, acting as adetent, to enter slight depressions, as 96, in the under surface of thecarrier, serves to prevent accidental dispiacementrot the latter and thework plate carried thereby, from adjusted positions, or in other words,from the position occupied when work is placed upon the work: plate, orthat occupied when the stitching is being performed.

Referring again. to the needle plate, attention is directed to theinclined lip 97, depending therefrom, the purpose of which is to deflectupwardly on needle plate, that portion of the work which is unsupportedby the work plate and the turntable. This deflecting a when ie ork isbeing swung The 'n'iethod of n mechanism is as follows :-.Assuming thework plate and clamp disk to have been swung to the positions in whichthey are shown in Fig. l, the operator places the work upon the workplate, in approximate ronceutricity with the turntable, the locatingmember having been previously adjusted to unmistakably define the properposition for the particular diameter of work to be stitched. The clampdisk is next moved by hand. pressure, applied at the button intoclamping relation to hold the work firmly upon the turntable. Thepresser wheel and toot being next raised by foot power, the work plateand associated parts are swung toward the needle plate. It the edge ofthe work, where it is unsupported by the work plate and turntable,happens to'sag, it will, on approaching the needle plate, be engaged bythe inclined lip 97, and finally deflected thereby, inpwardly on to thesaid needle plate. the regulating screw 93, engages the needle platesupport, the work plate will have passed the work under the presserwheel and foot. to a position where the extreme edge thereof, willextend between the trimming cutters an amount equal to that which is tobe trimmed from the edge of the pad. the work plate in proximity to thestitching mechanism, rotation of the work, tends to facilitate thepassage of its edge under the prcsser wheel and foot. Rotation of thework. for this purpose, may be readily effected, already implied, bypressing obliquely against the roughened upper surface of the clamp diskwith a finger of the same hand which controls both the adjustlag of saidclamp, and positioning offthe work plate, thus promoting convenience.

Having completed the above noted operations for 1'n'operly locating thework, the presser wheel and foot, may be lowered, an the machine set inmotion to perform feeding, trimming and stitchin When stitches have beenapplied throughout the desired eX- tentof the periphery of the work,the. latter may be guided away from the feeding, trimming and stitchingmechanism, after swinging the work plate slightly to the left (as seenin Fig.

Having thus described my'invention, what ll claim is,

1. In a sewing machine, the combination with stitch forming mechanism,of a needle plate, a work plate mounted for movement in a planesubstantially coincident with that of the needle plate, a turntablecarried by the work plate, an arm pivoted to the work plate, and arotatable disk carried by the arm for bodily movement toward and fromthe Y turntable.

in a sewin machine, the combination with stitch forming mechanism, of aneedle by the work plate, each of a work engaging surface substantiallycoincident with a single 'ing means for the Work plate adapted to permitof movement in said plane of the Work plate and turntable.

3. In a sewing machine, the combination with stitch forming mechanism,of a needle plate, a Work plate having an opening in its work engagingsurface, a turntable in said opening, supported by theworkplate belowthe workengaging surface thereof, an arm carried by the work plate,clamping means associated with the arm above the turntable and a supportfor the work plate adapted to permit of its movement toward andi rom theneedle plate.

4. Ina sewing machine the combination with stitch forming mechanism of amovable work support, a turntable carried by the work support, a diskcotiperative with the I turntable to clamp with stitch formingmechanism,

the work, an adjustable arm for carrying the disk, and means forconnecting said'arm and disk for universal movement therebetween. A

5-. In a sewing machine, the combination of a needle plate, a movableWork support, and pivotal .work' clamping means associated with the saiddevices hav- 7 work support, each work engaging surface substantially ina single plane, and the needle plate having an inclined lip leading toits work supporting surface, whereby an. of material held by theclamping means will be deflected to said needle plate supporting surfaceas the work support is moved toward the stitch forming mechanism. (3. Ina sewing machine, the combination with stitch forming mechanism and workfeeding :rnechanisin including a feed dog and prcsser foot, of a worksupport movable bodily toward and. iromlhe stitch forming andwork-feedingmechanism inthe plane of the work, said work supportembodying a turntable free to rotate. as the work is fed and a freelyrotatable clamp movable axially toward and from the turntable andconnected with the turntable for movement toward and from thefeedingmechanism by supporting connections located at one side of theaxis of the turntable and clamp and beyond the periphery of the work.

JOSEPH M. MERROW.

Witnesses:

113V. SPELLMAN,

F. E. Aunnnson.

of said devices having a

